About the Free JSON Tree Editor

The JSON Tree Editor is a visual, tree-based editor for JSON documents. Instead of hunting through brackets, you edit keys and values directly on an expandable tree — add objects and arrays, rename keys, and delete nodes — then export clean, valid JSON.

Key Features

• Edit-in-Place: Change keys and values directly on the tree; numbers, booleans, and null are detected automatically.
• Add Anything: Add root keys, object children, or array items on any container node.
• Visual Type Hints: Folders for objects, brackets for arrays, and color-coded dots for string, number, and boolean values.
• Live JSON Output: The generated JSON is always visible beside the tree and revalidated on demand.
• Copy & Export: Copy the formatted JSON or download it as a .json file.
• Upload Support: Open an existing .json file and start editing immediately.

Why Edit JSON Visually?

Hand-editing deeply nested JSON is error-prone — a single misplaced comma breaks the whole document. Tree editing eliminates syntax mistakes because the tool always rebuilds valid JSON for you, letting you focus on structure and content instead of punctuation.

How It Works

1. Paste JSON or upload a file, then click Open in Editor.
2. Click keys and values to edit them inline.
3. Hover a container node to add children, or use the delete icon to remove nodes.
4. Use Copy or Export .json to grab the rebuilt document.